Telephone



(No Model.)

J. F. MGLAUGHLIN.

TELEPHONE APPLIANCE.

No. 355,190. Patented Dec. 28, 1886.

witwaooao N. PETERS. Phnlo-Llllmgmpllw, Wash'mgmu. D, C.

' a citizen of the United States, and a resident of ingsle and (2* are secured tubes G and G, having flexible, so that it can be brought into any UNITED STATES PATENT Gretna.-

JAMES F. MOLAUGHLIN, OF PHILADELPHIA, PENNSYLVANIA.

TELEPHONE AP-PLIANCE.

SPECIFICATION" To all whom it may concern.- Be it known that I, JAMES F. MOLAUGHLIN,

Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Tele phone Appliances, of which the following is a specification.

My invention relates to improvements on the combined telephonic transmitter and receiver disclosed in my Patent No. 328,702, dated October 20, 1885; and it consists, mainly, in providing means whereby either the trans mitter or receiver can be cut out'at will, and, also, in furnishing means for rendering the instruments mentioned easily adjustable, so that they can be placed, respectively, at the mouth and car without inconvenience.

My invention is illustrated in the accompanying drawing, which shows the parts in detail, and also a diagram of the circuits.

In the drawing, A represents a box of any desired form or configuration, to which is suitably secured, as desired, an electric callbell, B, a magneto electric machine, 0, a transmitter and receiver, E and E, that can be used interchangeably in either capacity, cut-out devices D and D, a switch, F, and tubes G and G.

The poles of the field-magnets of the generator O are prolonged or provided with extensions, as shown at c and 0 These extensions may be an integral part of the poles or separate from and secured to them in any suitable manner. They are provided with helices a, a, and surrounded by casings e e 6* E .v Suitably mounted within the casings are diaphragms c and 6 to secure the necessary means for transmitting and receiving the magnetic or electric impulses.

To the removable covers 6 and e of the easmouth and ear pieces 9 9'. The tube G is desired position for convenient use. To facilitate this, however, the extension c of the magnet G is provided with a joint, 0*. The other extension, 0", has secured to it a sleeve or tube, a, of rubber, to the outer end of which the core of the transmitter is attached. A steel spring, 70, serves to complete the magforming part of LettersPatent No. 355,190, dated December 28, 1886. Application filed June 9, 1886. Serial No. 204,672. lNo model.)

that in removing the telephone the metallic armf of the support will be drawn outward,

and in restoring the telephone the said arm will be pushed back. 7

On the inner end of the armf is a metallic cross-piece, f, which normally makes contact with a spring, h, connected to the call apparatus, the arm itself making contact under allcircumstances with the spring m, which is connected to the line binding-post. When, however, the arm is drawnoutward by the removal of the telephone, contact between the oross-piece f and the spring h is broken, and a new contact is made between the said crosspiece and a spring, a, with which is connected a circuit which includes both the transmitter and receiver. This function of my apparatus is not in itself new, and is well understood in the art. I have added, however, to the means for switching out and in the transmitter and receiver, means whereby either instrument can be cut out at will after the act of switching in both has been completed. These means consist in my present invention of a pair of circuit-closers, D D, one of which is interposed tallic anvil for completing an electric circuit. By pressing upon one circuit-closer or the other an operator can at will remove from the telephonic circuit either the transmitter or receiver, and to that extent decrease the resistance of the circuit.

Having now described my invention, what rcc adapted to be forced into contact with a me- 1. The combination, with a telephone and switch mechanism for cutting out the bell and introducing the transmitter and receiver into the circuit, of two circuit-controllers inter- 5 posed, one between the receiver and ground and the other between the transmitter and ground, as set forth.

2. The combination, with a telephone-support and switch mechanism operated thereby to for automatically cutting out the call appara tus and switching in the transmitter and receiver whenever the telephone is taken down,

of two circuit-closers interposed, one between the receiver and ground and the other be- 15 tween the transmitter and ground, as set forth. 8. The combination, in a telephone, of a magnetoelectric call apparatus, the poles of the magnet being prolonged to form the cores of a magneto transmitter and receiver, 'and the extensions being jointed for convenient 2o manipulation, substantially as described.

4. The combination of the magnet O, extension 0, rubber sleeve i, steel springk, and core 0", the latter forming part of a telephonictransmitter mounted thereon, as set forth. 25 Signed at Philadelphia, in the county of Philadelphia and State of Pennsylvania, this 21st day of May, A. D. 1886.

JAMES F. MOLAUGHLIN. Witnesses:

FRANK M. MILLER, J ULIUs HIRSHFELD. 

